Granted Patent
Utility
US 5,154,780 · App. 07/542,460
Metallurgical products improved by deformation processing and method thereof
Inventor:
M. K. Premkumar
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Jun 22, 1990
Inventor
M. K. Premkumar
Assignee (at issue)
Aluminum Company of America
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.